Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7942984 | Steel pipe with good magnetic properties and method of producing the same | Yasuhide Ishiguro, Yoshikazu Kawabata, Kei Sakata, Masayuki Sakaguchi, Masayoshi Ishida +1 more | 2011-05-17 |
| 7591914 | High-workability steel pipe and method of producing same | Takaaki Toyooka, Yoshikazu Kawabata, Akira Yorifuji, Masanori Nishimori, Takatoshi Okabe +1 more | 2009-09-22 |
| 7018488 | Steel pipe for use in reinforcement of automobile and method for production thereof | Takaaki Toyooka, Masanori Nishimori, Yoshikazu Kawabata, Akira Yorifuji, Takatoshi Okabe +1 more | 2006-03-28 |
| 6949728 | Impeder for manufacturing welded pipe | Takaaki Toyooka, Takatoshi Okabe, Masatoshi Aratani, Osamu Kondo | 2005-09-27 |
| 6755919 | Stainless steel tube for automobile structure | Takaaki Toyooka, Akira Yorifuji, Makoto Kitazawa, Yoshikazu Kawabata, Masatoshi Aratani +1 more | 2004-06-29 |
| 6736910 | High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same | Takaaki Toyooka, Yoshikazu Kawabata, Akira Yorifuji, Masanori Nishimori, Takatoshi Okabe +2 more | 2004-05-18 |
| 6505491 | Rolling mill and rolling-mill train | Shigeharu Ochi, Hiroshi Fujiwara, Sho Inui, Takaaki Toyooka, Akira Yorifuji +4 more | 2003-01-14 |
| 6375059 | Method for smoothing steel pipe seam portion | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2002-04-23 |
| 6331216 | Steel pipe having high ductility and high strength and process for production thereof | Takaaki Toyooka, Akira Yorifuji, Masanori Nishimori, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-12-18 |
| 6290789 | Ultrafine-grain steel pipe and process for manufacturing the same | Takaaki Toyooka, Akira Yorifuji, Masanori Nishimori, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-09-18 |
| 6216511 | Apparatus and method for smoothing a welded seam of steel pipe | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2001-04-17 |
| 6216520 | Rolling mill | Shigeharu Ochi, Hiroshi Fujiwara, Sho Inui, Takaaki Toyooka, Akira Yorifuji +4 more | 2001-04-17 |
| 6216940 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Yoshinori Sugie +5 more | 2001-04-17 |
| 6041632 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Yoshinori Sugie +5 more | 2000-03-28 |
| 6006789 | Method of preparing a steel pipe, an apparatus thereof and a steel pipe | Takaaki Toyooka, Akira Yorifuji, Toshio Ohnishi, Yuji Hashimoto, Nobuki Tanaka +1 more | 1999-12-28 |
| 5942132 | Method of and apparatus for producing steel pipes | Takaaki Toyooka, Akira Yorifuji, Yuji Hashimoto, Toshio Ohnishi, Nobuki Tanaka +3 more | 1999-08-24 |
| 5673579 | Welded steel pipe manufacturing apparatus and method | Yuuji Hashimoto, Takaaki Toyooka, Susumu Itadani, Tsutomu Ide | 1997-10-07 |